EP1297880B1 - Luftfilter für Verbrennungsmotoren - Google Patents
Luftfilter für Verbrennungsmotoren Download PDFInfo
- Publication number
- EP1297880B1 EP1297880B1 EP02102388A EP02102388A EP1297880B1 EP 1297880 B1 EP1297880 B1 EP 1297880B1 EP 02102388 A EP02102388 A EP 02102388A EP 02102388 A EP02102388 A EP 02102388A EP 1297880 B1 EP1297880 B1 EP 1297880B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- tubes
- outlet
- passage
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 22
- 239000003570 air Substances 0.000 description 123
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4281—Venturi's or systems showing a venturi effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/60—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for the intake of internal combustion engines or turbines
Definitions
- the invention relates to an air filter for internal combustion engines, which one of a Has housing body and a housing cover existing filter housing, which an air inlet opening, an air outlet opening and an inside of the filter housing arranged filter element, which the interior of the filter housing in a Inlet and an outlet air space divided.
- Air filters of the type mentioned are known in the art.
- the filter housing in use, including cuboid and cylindrical filter housings.
- various forms of the filter element common, such as cuboid filter elements with rectangular cross-section and cylindrical filter elements with annular cross-section and many others.
- Such Air filters are regularly arranged in the intake tract of internal combustion engines and have the task to clean the sucked in by the internal combustion engine ambient air.
- the object of the invention is therefore to provide a device which in at small footprint the intake noise of internal combustion engines reduced.
- the task is performed by a in the intake stroke of an internal combustion engine arranged air filter solved which according to claim 1 within the Air Filter Housing Various co-operating elements for reduction having the sound energy of the intake noise.
- the air filter according to the invention comprises a filter housing, which consists of a Housing body and a housing cover consists and in its interior Receives filter element.
- the filter housing has an air inlet opening, through which the air sucked from the environment into the air filter housing can enter and an air outlet through which the air filter cleaned air, the air filter housing in the direction of the engine can leave.
- the air filter element divides the filter housing into an intake air space, which is vented from a through the air inlet opening Inlet air inlet section and an inlet air collecting section consists and an outlet air space which is vented through the air outlet opening.
- a first set of tubes is arranged, which the Connect inlet air inlet section with the inlet air collection section and through which the entire air flowing through the filter is passed. After the air the first set of tubes located in the intake air space has passed, it is passed through the filter element and in the usual way cleaned.
- the filter element may, as stated above, different Have shapes. Usual filter elements are made regularly a multi-folded paper medium, which pores with a certain Diameter or within a certain diameter range having.
- This channel is shaped as a Venturi nozzle whose Narrowing in the direction of air flow after a steep cross-sectional constriction the channel is located near the air inlet of the channel. Behind the narrowest point extends the channel to its original cross-section in one flat course.
- the channel divides the outlet air space into one Outlet air collecting section and a channel section and conducts the entire the air flowing through the filter to the air outlet, where they the filter housing leaves and through channels of the intake tract to the internal combustion engine is directed.
- the air is after Passage through the filter element in a pipe section of the channel collected, in which they through a variety of breakthroughs, preferably square openings, in the peripheral wall of the pipe section can occur. From this pipe section, the air in the axial direction in passed the formed as Venturi nozzle channel section.
- An embodiment of the invention provides that the air after passage through the channel shaped as Venturi nozzle through radial openings in a channel portion formed as a pipe section flows to the air outlet opening.
- a second set of tubes is arranged, which the outlet air space in an outlet air pre-pipe section and an outlet air outlet section divide. Through this second set of tubes enters the flowing through the channel section Air through and is directed to the air outlet.
- a further embodiment of the invention provides that the filter housing and the filter element have a cylindrical shape.
- the as Venturi nozzle formed channel and those arranged in the intake air space Tubes should be aligned axially parallel to the central axis of the filter element.
- Another embodiment of the invention provides that the first sentence Tubes on the air inlet side of the tubes on a plate-shaped Support body are attached, the passage of air to be cleaned for Filter element down to the passage cross section of all tubes of the first set locks.
- the support body has a centrally formed bulge which is formed to the inlet air inlet portion.
- the number, length and diameter of the tubes of the first and / or the second set of tubes depending on Sound characteristic of the internal combustion engine are set to thereby an optimal noise minimization of the intake noise of the internal combustion engine to reach.
- the underlying the construction of the air filter according to the invention Method for reducing the intake noise of internal combustion engines is that the sound waves, which contrary to Air flow direction through the air outlet in the filter housing first pass through the venturi formed as a channel and doing in the gradually narrowing cross-section of the channel to the Walls of the channel are reflected and compressed. After going through the The narrowest part of the channel loses the kind of compacting sound waves by the abrupt cross-sectional widening of the channel to sound energy and arrive thereafter in the optionally provided pipe section of the channel. From this pipe section, the sound waves by a reversal of direction, for example, not less than 90 °, through the openings in the Peripheral wall of the pipe section led out, creating another Reduction of the sound energy is achieved.
- the sound waves passed through the air filter element and learn the known, slight damping, which also in air filters according to the prior art is reached.
- the sound waves After passing through the filter element, the sound waves enter the tubes of the first set of tubes, which advantageously according to Claim 4 are arranged so that a further reversal of direction of the Sound waves, e.g. by not less than 90 °, this takes place.
- the first set of tubes which are easy in the direction of passage of the sound waves expand conically, the sound waves continue to lose energy.
- the such sound attenuated sound waves arrive after exiting the first Set of tubes to the air inlet opening, which advantageously arranged so can be that a renewed change of direction of the sound waves at the exit through the air inlet opening with respect to the direction of passage of the tubes he follows.
- Housing body and lid as well as arranged in the housing interior Components are advantageously made of a stiff and low-vibration Material, preferably a plastic produced. This will be the Sound radiation of the intake noise over the outer surfaces of the air filter and reduces the effect of the air filter itself as a resonant body. About that In addition, the air filter housing, as well as other components of the Air filters, reinforced by ribs such that the rigidity increases and larger resonance surfaces are avoided.
- thermoplastic Primary molding process such as an injection molding process or a Thermoform process to produce.
- FIGS. 1 and 3 The direction of air flow is indicated in FIGS. 1 and 3 by arrows.
- FIGS. 1 and 2 In the embodiment of the invention shown in FIGS. 1 and 2 is at a cylindrical housing body 10 with air outlet 11, a housing cover 20 with air inlet opening 21 by means of conventional mounting brackets 22nd releasably secured.
- a cylindrical filter element 30 is coaxial with the longitudinal axis 35 of the housing body within the filter housing and divides the interior of the filter housing in an intake air space 12, 15 and an outlet air space 13, 14 on.
- the air outlet opening 11 facing side the filter element 30 by means of an elastic, annular radial seal 31st on to a housing 32 extending into the housing interior.
- the filter element 30 At his the other end is the filter element 30 with an elastic, disc-shaped End cap 34 provided so that at this end no air in the axial direction can enter the interior of the filter element.
- the elastic end cap 34 is supported by an annular elevation axially on a plate-shaped Supporting body 40 from.
- the support body 40 is arranged rotationally symmetrically about the longitudinal axis 35. It has a larger diameter than the filter element 30 and divided the intake air space in an intake air inlet portion 15 and a Inlet air collection section 12.
- the support body 40 is a first set several mutually parallel and circularly arranged tubes 41 in the outer region of the outlet opening facing side of the support body connected.
- the tubes of the first set of tubes 41 are located axially parallel to the longitudinal axis 35 outside of the filter element 30. They run, starting from its attached to the support body 40 end to her freestanding end 42 conical to.
- the plate-shaped support body 40 is supported in its outermost region axially on the Gepurekel 20.
- the support body has in its inner diameter range, a curvature in the direction of the Inlet air inlet portion 15 is formed.
- a Venturi nozzle formed channel 50 which the outlet air space in a Outlet air collecting section 13 and a channel section 14 divided.
- the Channel 50 has at its the air inlet opening facing the end first pipe section 51 which extends axially on the elastic end cap 34 supported.
- the first pipe section 51 has in its peripheral surface a Variety of square openings 52 on.
- the first pipe section takes up about 1/8 of the total length of the channel. After this first pipe section narrows the channel over a length of about 1/8 its overall length by an inwardly convex, arcuate course its wall to about 1/3 of its diameter and widens immediately after its narrowest point over a length of about 5/8 of its Total length back to the original diameter.
- the air flowing through the filter passes over the radial air inlet opening 21 and is directed to the inlet air inlet section 15 curved surface of the support body 40 deflected in the axial direction and to attached to the support body 40 ends of the tubes of the first set of tubes 41 headed.
- the air passes the first set of tubes 41 and enters their free Ends 42 off. After that, it is deflected by not less than 90 ° and flows through the filter element 30 in the radial direction.
- the air flows towards the end cap 34 of the filter element and enters radial direction through the apertures 52 in the first pipe section 51 in the Interior of the pipe section.
- the air is deflected again in the axial direction and flows through the Venturi nozzle shaped channel 50 in the direction of Air outlet 11 and leaves the filter at the air outlet opening 11th
- Sound waves emitted by the internal combustion engine 11 pass through the air filter opposite direction of the air flow and, like these, this deflected several times. They enter the air outlet 11 in the Air filter and are reflected by reflections to the funnel in the direction the pipe section 51 formed walls of the channel 50 and through the abrupt cross-sectional widening of the channel 50 just before the second Tube section 51 steamed.
- the muffled sound waves penetrate this Filter element 30, occur at the free end 42 in the tubes of the first Tubing set 41 and go through these tubes in the direction of the Air intake opening. As a result, the sound waves continue to lose their sound energy. Leave such kind of subdued low intensity sound waves the air filter through the air inlet opening 21st
- the channel 50 is in an alternative embodiment the invention by a pipe section 60 in the axial direction extended.
- the pipe section 60 is supported by a first piece of pipe section 63 radially in the second pipe section 53 of the channel 50 from.
- a second Pipe section 61 which with a variety of square Breakthroughs 62 is provided in the radial direction.
- the pipe section 60 is in one piece with a pipe end cap 64, which the pipe piece 60th in the axial direction on the side facing away from the channel closes.
- the Pipe end cap 64 is supported radially on the inner wall of the filter housing 10 off.
- the pipe section 60 separates the duct section of the outlet air space from one further, also belonging to the outlet air space section, which around the Pipe 60 is arranged around, from.
- This section is by a disc-shaped ring 70 in a Auslass Kunststoffvorröhrenabêt 73 and a Outlet air outlet section 74 divided.
- the disk-shaped ring 70 has a second set of tubes 71 extending in the direction of Air outlet 11 extend and the outlet air pre-tube section 73 with connect to the outlet air outlet section 74.
- This second set of tubes 71 is parallel to the first set of tubes 41 and is like this arranged concentrically about the central axis 35.
- the tubes of the second movement 71 are shorter and have a larger diameter than the tubes of the first sentence 41.
- the number of tubes of the second set is lower as that of the first sentence.
- the disk-shaped ring 70 is at the outer Surface of the wall of the channel 60 immediately adjacent to attached second pipe section 61. At its outer circumference is supported the disk-shaped ring 70 on the wall of the housing body 10 from.
- the air outlet 11 is in the alternative embodiment of the Air filter inserted in the radial direction in the housing body 10 and vented the outlet air outlet portion 74.
- the air flows through the same way as in the previously described embodiment the Inlet air inlet section 15, the first set of tubes 41, the filter element 30, the apertures 52 and the Venturi nozzle shaped channel 50.
- From the Channel 50 flows the air in the axial direction in the pipe section 60 and is off this pipe section 60 through the openings 62 in the radial direction led out and thereby redirected accordingly.
- the air collects in the Auslass Kunststoffvorröhrenabêt 73 and is in the axial direction through the second Set of tubes 71 in the outlet air outlet section 74 passed.
- From the outlet air outlet section 74 The air is redirected by not less than 90 ° by the radially arranged air outlet 11 led out of the filter housing.
- the sound waves emitted by the internal combustion engine 11 are caused by the additional Deflection in the outlet air outlet section 74, in Outlet air pre-pipe section 73 and in the second pipe section 62 as well additionally damped by the passage of the tubes 71.
Description
- Fig. 1
- eine teilgeschnittene Längsansicht des Filters;
- Fig. 2
- eine perspektivische Explosionsdarstellung des Filters.
- Fig. 3
- eine teilgeschnittene Längsansicht einer alternativen Ausführungsform des Filters;
- Fig.4
- eine perspektivische Explosionsdarstellung einer alternativen Ausführungsform des Filters.
Claims (15)
- Luftfilter für Verbrennungsmotoren, umfassendein aus einem Gehäusekörper (10) und einem Gehäusedeckel (20) bestehendes Filtergehäuse mit einer Lufteinlassöffnung (21) und einer Luftauslassöffnung (11),ein Filterelement (30), welches innerhalb des Filtergehäuses angeordnet ist, dieses in einen aus einen Einlasslufteingangsabschnitt (15) und Einlassluftsammelabschnitt (12) bestehenden Einlassluftraum und einen Auslassluftraum (13, 14) aufteilt,ein im Auslassluftraum angeordneter Kanal welcher als Venturi-Düse geformt ist,der sich von einer hinter seinem Lufteinlass liegenden Engstelle aus in Richtung seines Luftauslasses mit geringer Steigung erweitert,den Auslassluftraum in einen Auslassluftsammelabschnitt (13) und einen innerhalb des Kanals liegenden Kanalabschnitt (14) unterteilt undden Auslassluftsammelabschnitt (13) mit der Luftauslassöffnung (11) verbindet.
- Luftfilter nach Anspruch 1,
dadurch gekennzeichnet, dass der Lufteinlass des als Venturi-Düse ausgebildeten Kanals (50) als ein mit einer Vielzahl von Durchbrüchen (52) versehener Rohrabschnitt (51) ausgebildet ist. - Luftfilter nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass der Luftauslass des als Venturi-Düse ausgebildeten Kanals (50) als ein mit einer Vielzahl von Durchbrüchen (55) versehener Rohrabschnitt (54) ausgebildet ist. - Luftfilter nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass im Auslassluftraum ein zweiter Satz Röhren (71) angeordnet ist, dessen Röhren den Kanalabschnitt (14) mit der Luftauslassöffnung (11) verbinden. - Luftfilter nach Anspruch 4,
dadurch gekennzeichnet, dass die Röhren des zweiten Röhrensatzes (71) kürzer sind und/oder einen größeren Durchmesser aufweisen als die Röhren des ersten Röhrensatzes (41). - Luftfilter nach einem der Ansprüche 2, 3, 4 oder 5,
dadurch gekennzeichnet, dass die Durchbrüche (52) quadratische ausgebildet sind. - Luftfilter nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass Filtergehäuse (10, 20) und Filterelement (30) zylindrisch ausgebildet sind. - Luftfilter nach Anspruch 7,
dadurch gekennzeichnet, dass der als Venturidüse ausgebildete Kanal (50) und der im Einlassluftraum angeordnete erste Satz Röhren (41) und/oder der im Auslassluftraum angeordnete zweite Satz Röhren (71) achsparallel zur Mittelachse (35) des Filterelements ausgerichtet sind. - Luftfilter nach Anspruch 7 oder 8,
dadurch gekennzeichnet, dass die Röhren des ersten Röhrensatzes (41) auf ihrer Lufteinlassseite an einem tellerförmig ausgebildeten Tragkörper befestigt sind, der den Durchtritt von zu reinigender Luft zum Filterelement (30) bis auf den Durchtrittsquerschnitt aller Röhren, des ersten Röhrensatzes (41) sperrt. - Luftfilter nach Anspruch 8,
dadurch gekennzeichnet, dass der tellerförmig ausgebildete Tragkörper (40) in seinem inneren Durchmesserbereich eine zum Einlasslufteingangsabschnitt (15) ausgeformte Wölbung aufweist. - Luftfilter nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der als Venturidüse ausgebildete Kanal (50) innerhalb des Filterelements (30) liegt und der erste Satz Röhren (41) nahe der äußeren Umfangsfläche Filterelements (30) angeordnet sind. - Luftfilter nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Lufteinlassöffnung (21), der Einlasslufteingangsabschnitt (15), der erste Satz Röhren (41), der Einlassluftsammelabschnitt (12), das Filterelement (30), der Auslassluftsammelabschnitt (13), der Kanalabschnitt (14) und die Luftauslassöffnung (11) funktional aufeinanderfolgend im Luftfilter angeordnet sind, so dass die Strömungsrichtung der Luft sich beim Passieren der Abschnitte mehrfach ändert. - Luftfilter nach Anspruch 12,
dadurch gekennzeichnet, dass zusätzliche das Rohrstück (60), der Auslassluftvorröhrenabschnitt (73), der zweite Satz Röhren (71) und der Auslassluftausgangsabschnitt (74) funktional aufeinanderfolgendend dem Luftfilter angeordnet sind, so dass die Strömungsrichtung der Luft sich beim Passieren der Abschnitt mehrfach ändert. - Luftfilter nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Röhren des ersten Röhrensatzes (41) und/oder des zweiten Röhrensatzes (71) in Luftströmungsrichtung konisch zulaufen. - Luftfilter nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass zur Geräuschminimierung die Anzahl, die Länge und der Durchmesser der Röhren des ersten Röhrensatzes (41) und/oder des zweiten Röhrensatzes (71) in Abhängigkeit der Schallcharakteristik des Verbrennungsmotors festgelegt sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20115898U DE20115898U1 (de) | 2001-09-27 | 2001-09-27 | Luftfilter für Verbrennungsmotoren |
DE20115898U | 2001-09-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1297880A2 EP1297880A2 (de) | 2003-04-02 |
EP1297880A3 EP1297880A3 (de) | 2003-07-23 |
EP1297880B1 true EP1297880B1 (de) | 2005-05-25 |
Family
ID=7962216
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02102388A Expired - Lifetime EP1297880B1 (de) | 2001-09-27 | 2002-09-26 | Luftfilter für Verbrennungsmotoren |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1297880B1 (de) |
AT (1) | ATE296151T1 (de) |
DE (2) | DE20115898U1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7618480B2 (en) | 2007-07-16 | 2009-11-17 | Flair Corporation | Filter assembly and method |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4121392B2 (ja) * | 2003-02-17 | 2008-07-23 | 本田技研工業株式会社 | 自動二輪車のエアクリーナ装置 |
GB2450735B (en) * | 2007-07-05 | 2012-11-28 | Air Safety Ltd | Air filter assembly |
CN105032074B (zh) * | 2015-07-27 | 2016-11-23 | 青岛玉兰祥商务服务有限公司 | 一种带进气阀门的移动式空气净化装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5112372A (en) * | 1991-10-22 | 1992-05-12 | Donaldson Company, Inc. | Advanced disposable air cleaner |
DE19810633A1 (de) * | 1998-03-12 | 1999-09-16 | Mann & Hummel Filter | Einrichtung zur Filtrierung der Ansaugluft einer Brennkraftmaschine |
-
2001
- 2001-09-27 DE DE20115898U patent/DE20115898U1/de not_active Expired - Lifetime
-
2002
- 2002-09-26 DE DE50203184T patent/DE50203184D1/de not_active Expired - Fee Related
- 2002-09-26 AT AT02102388T patent/ATE296151T1/de not_active IP Right Cessation
- 2002-09-26 EP EP02102388A patent/EP1297880B1/de not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7618480B2 (en) | 2007-07-16 | 2009-11-17 | Flair Corporation | Filter assembly and method |
US7828881B2 (en) | 2007-07-16 | 2010-11-09 | Flair Corporation | Filter assembly and method |
USRE44424E1 (en) | 2007-07-16 | 2013-08-13 | Spx Flow Technology Usa, Inc. | Filter assembly and method |
Also Published As
Publication number | Publication date |
---|---|
DE20115898U1 (de) | 2003-02-13 |
EP1297880A2 (de) | 2003-04-02 |
ATE296151T1 (de) | 2005-06-15 |
DE50203184D1 (de) | 2005-06-30 |
EP1297880A3 (de) | 2003-07-23 |
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